Retransmission counter (N2)
Determines the maximum number of frame retransmissions to attempt following the expiration of the retransmission timer (T1). The default is 10, and the range 1 to 255. The count used by a DTE does not have to match the count used by the DCE.
Retransmission timer (T1)
Defines the period, in .1-second units, to wait for an acknowledgment of a transmitted frame. When T1 expires, the frame is retransmitted. The default is 10, and the range is 1 to 3000. The time used by a DTE does not have to match the time used by the DCE.
Acknowledgment timer (T2)
Determines the maximum delay allowed, in .1-second units, before an acknowledgment frame must be sent to ensure receipt prior to the expiration of the T1 timer at the other end of the link. The default is 4, and the range is 0 to 3000.
Idle timer (T3)
Defines the period, in .1-second units, that the line can remain idle before being considered in a non-active, non-operational state. When this timer expires, data-link setup procedures begin. Specifying zero disables this timer. The default is 250, and the range is 0 to 32,000. The time used by a DTE does not have to match the time used by the DCE.
Window size (k)
Configures the maximum number of unacknowledged data frames that can be sent before receiving an acknowledgment. Use this parameter with the Sequence numbering parameter below. For modulo 8 sequencing, the default is 7 and the range is 1 to 7. For modulo 128 sequencing, the default is 7 and the range is 1 to 127.
Sequence numbering
· Basic (modulo 8), which is the default, configures modulo 8 sequencing.
· Extended (modulo 128) configures modulo 128 sequencing